2161999602 has 48 divisors (see below), whose sum is σ = 5360284800. Its totient is φ = 616934016.

The previous prime is 2161999601. The next prime is 2161999621. The reversal of 2161999602 is 2069991612.

2161999602 is a `hidden beast` number, since 21 + 6 + 19 + 9 + 9 + 602 = 666.

It is not an unprimeable number, because it can be changed into a prime (2161999601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93274 + ... + 114122.

It is an arithmetic number, because the mean of its divisors is an integer number (111672600).

Almost surely, 2^2161999602 is an apocalyptic number.

2161999602 is an abundant number, since it is smaller than the sum of its proper divisors (3198285198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2161999602 is a wasteful number, since it uses less digits than its factorization.

2161999602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21687 (or 21684 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 2161999602 is about 46497.3074704332. The cubic root of 2161999602 is about 1293.0595809848.

The spelling of 2161999602 in words is "two billion, one hundred sixty-one million, nine hundred ninety-nine thousand, six hundred two".